| Message ID | 1d7b6e421a335255da956804b43ce3517538409c.1351244153.git.viresh.kumar@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Friday, October 26, 2012 03:06:26 PM Viresh Kumar wrote: > Avoid calling cpufreq driver's target() routine if new frequency is same as > policies current frequency. > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Looks reasonable. Any objection from anyone? Rafael > --- > drivers/cpufreq/cpufreq.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > index 261ef65..28dc134 100644 > --- a/drivers/cpufreq/cpufreq.c > +++ b/drivers/cpufreq/cpufreq.c > @@ -1476,6 +1476,10 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, > > pr_debug("target for CPU %u: %u kHz, relation %u\n", policy->cpu, > target_freq, relation); > + > + if (target_freq == policy->cur) > + return 0; > + > if (cpu_online(policy->cpu) && cpufreq_driver->target) > retval = cpufreq_driver->target(policy, target_freq, relation); > >
On Friday, October 26, 2012 01:17:12 PM Rafael J. Wysocki wrote: > On Friday, October 26, 2012 03:06:26 PM Viresh Kumar wrote: > > Avoid calling cpufreq driver's target() routine if new frequency is same as > > policies current frequency. > > > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > > Looks reasonable. > > Any objection from anyone? OK, no objections. Applied to the linux-next branch of linux-pm.git as v3.8 material. Thanks, Rafael > > --- > > drivers/cpufreq/cpufreq.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > > index 261ef65..28dc134 100644 > > --- a/drivers/cpufreq/cpufreq.c > > +++ b/drivers/cpufreq/cpufreq.c > > @@ -1476,6 +1476,10 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, > > > > pr_debug("target for CPU %u: %u kHz, relation %u\n", policy->cpu, > > target_freq, relation); > > + > > + if (target_freq == policy->cur) > > + return 0; > > + > > if (cpu_online(policy->cpu) && cpufreq_driver->target) > > retval = cpufreq_driver->target(policy, target_freq, relation); > > > > >
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 261ef65..28dc134 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1476,6 +1476,10 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, pr_debug("target for CPU %u: %u kHz, relation %u\n", policy->cpu, target_freq, relation); + + if (target_freq == policy->cur) + return 0; + if (cpu_online(policy->cpu) && cpufreq_driver->target) retval = cpufreq_driver->target(policy, target_freq, relation);
Avoid calling cpufreq driver's target() routine if new frequency is same as policies current frequency. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/cpufreq/cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+)